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  • Arcengine——ArcSence沿路径飞行

    前几天自己一时兴起,想根据GPS点文件做一个动画,或者叫做追踪分析吧,以前没有做过这方面的东西,第一印象应该是三维上面的沿路径飞行,我决定采用Arcsence来开发。

    首先研究这个名词“路径飞行”肯定得有路径,OK,我们联想到PathGeometry或者Path,根据这两个关键字去AE10.0的帮助里去搜索,发现沿路径飞行需要IAGAnimationUtils、IAGImportPathOptions等动画接口(在ArcGlobal里同样适用)。

    顺便在这里插上一句:VS2010升级后,真TM难用,帮助文件是网页形式的,而且很多帮助都找不到,还没有VS2008的帮助好用呢,而且VS2010还进行了很多重大的改进,特别是对互操作程序集的改进,也就是说我们已经习惯后面有”Class”字符的类不能用了,只能去掉”Class”后缀,具体文档详见:

    http://bbs.esrichina-bj.cn/ESRI/viewthread.php?tid=107612&extra=page%3D1

    http://msdn.microsoft.com/zh-cn/library/ee855831.aspx

    不过研究和在网上查资料,这个问题还可以解决哦,有两种方式:

    (1)       在VS项目属性中的“目标框架”里不选择.Net4.0就可以了。

    (2)      
    在所有引用的属性里的“嵌入互操作类型”修改为false 也可以。

    好了,继续上接路径飞行,既然路径飞行,那我肯定需要路径啊,那么路径就肯定是GPS的点喽,那么我们需要先处理GPS数据,使其成为点类型的Shp

    (http://www.cnblogs.com/fengyunlishi/archive/2012/10/02/2710574.html),

    获得点后开始生成路径线,根据路径线生成动画,具体代码如下:

    主代码:

    ILayerFactoryHelper pLayerFactoryHelper = new LayerFactoryHelperClass();

                IFileName filename = new FileNameClass();

                filename.Path = @"E:\GPSData\GSM32295.shp";

                IEnumLayer enumlayer = pLayerFactoryHelper.CreateLayersFromName(filename as IName);

                ILayer layer;

                enumlayer.Reset();

                layer = enumlayer.Next();

                while (layer != null)

                {

                    axSceneControl1.Scene.AddLayer(layer, false);

                    layer = enumlayer.Next();

                    axSceneControl1.SceneGraph.RefreshViewers();

                }

     //  axSceneControl1.LoadSxFile(@"E:\GPSData\test.sxd");     这句话后面有解释     

     IPolyline pPolyline = new PolylineClass();

            

                pPolyline.SpatialReference = _spatial;

                IPointCollection pPolycollect = pPolyline as IPointCollection;

                getPointcollection(pPolycollect);

                CreateAnimationFromPath(axSceneControl1.Scene, pPolyline, 1,30);

    处理点击,成为PolyLine

    public IPointCollection getPointcollection( IPointCollection pPolycollect)

            {

                IWorkspaceFactory pWSF = new ShapefileWorkspaceFactoryClass();

                IFeatureWorkspace pWS = (IFeatureWorkspace)pWSF.OpenFromFile(@"E:\GPSData", 0);

               IFeatureClass pFeatureclass= pWS.OpenFeatureClass("GSM32295.shp");

               IFeatureCursor pCursor= pFeatureclass.Search(null, false);

               while (pCursor!=null)

                {

                    IFeature pFeature = pCursor.NextFeature();

                    if (pFeature != null)

                    {

                        IGeometry pGeometry = pFeature.Shape;

                        object objmiss = Type.Missing;

                        IPoint pPoint = new PointClass();

                        pPoint.SpatialReference = _spatial;

                        pPoint.X =Convert.ToDouble( pFeature.get_Value(4));

                        pPoint.Y = Convert.ToDouble(pFeature.get_Value(3));

                        pPoint.Z = Convert.ToDouble(pFeature.get_Value(5));

                        pPolycollect.AddPoint(pPoint, ref objmiss, ref objmiss);

                    }

                    else

                    {

                        pCursor = null;

                    }

                }

               if (pPolycollect.PointCount != 0)

                   return pPolycollect;

               else

                return null;

            }

    飞行代码:

    //第三个参数是移动的方式,其中1表示移动观察者,2表示移动目标,其他表示两个都移动

            /// <summary>

            /// 

            /// </summary>

            /// <param name="_pScene"></param>

            /// <param name="_pPolyline"></param>

            /// <param name="_pType"></param>

            public void CreateAnimationFromPath(IScene pScene, IPolyline _pPolyline, int _pType, double _pDuration)

            {

                IScene _pScene = pScene;

                                 // 获取动画扩展对象

                ESRI.ArcGIS.Analyst3D.IBasicScene2 pBasicScene2 =  (ESRI.ArcGIS.Analyst3D.IBasicScene2)_pScene; // Explicit Cast

                ESRI.ArcGIS.Animation.IAnimationExtension pAnimationExtension = pBasicScene2.AnimationExtension;

                //创建两个对象,一个用于导入路径,一个用于播放

                ESRI.ArcGIS.Animation.IAGAnimationUtils pAGAnimationUtils = new  ESRI.ArcGIS.Animation.AGAnimationUtilsClass();

                ESRI.ArcGIS.Animation.IAGImportPathOptions pAGImportPathOptions = new ESRI.ArcGIS.Animation.AGImportPathOptionsClass();

                // 设置参数

                //参数设置不正确会出错,尤其是类型,对象等信息!

                pAGImportPathOptions.BasicMap = (ESRI.ArcGIS.Carto.IBasicMap)_pScene;

                pAGImportPathOptions.AnimationTracks = pAnimationExtension.AnimationTracks;

                pAGImportPathOptions.AnimationType = new AnimationTypeCameraClass();

               // pAGImportPathOptions.AnimationType = new AnimationTypeGlobeCameraClass();

                 pAGImportPathOptions.LookaheadFactor = 1;              

    pAGImportPathOptions.PutAngleCalculationMethods(esriPathAngleCalculation.esriAngleAddRelative,

                      esriPathAngleCalculation.esriAngleAddRelative,

                      esriPathAngleCalculation.esriAngleAddRelative);

                 pAGImportPathOptions.AnimatedObject = _pScene.SceneGraph.ActiveViewer.Camera;//

                 //pAGImportPathOptions.AnimatedObject = pScene.SceneGraph.ActiveViewer.Camera;

                pAGImportPathOptions.PathGeometry = _pPolyline;

                                 //都移动

                if (_pType == 1)

                {

                    pAGImportPathOptions.ConversionType = ESRI.ArcGIS.Animation.esriFlyFromPathType.esriFlyFromPathObsAndTarget;

                }//观察者移动

                else if (_pType == 2)

                {

                    pAGImportPathOptions.ConversionType = ESRI.ArcGIS.Animation.esriFlyFromPathType.esriFlyFromPathObserver;

                }

                else

                {

                    pAGImportPathOptions.ConversionType = ESRI.ArcGIS.Animation.esriFlyFromPathType.esriFlyFromPathTarget;

                }

               

                pAGImportPathOptions.RollFactor = 0;

                                 pAGImportPathOptions.AnimationEnvironment =  pAnimationExtension.AnimationEnvironment;

                 pAGImportPathOptions.ReversePath = false;

                ESRI.ArcGIS.Animation.IAGAnimationContainer AGAnimationContainer = pAnimationExtension.AnimationTracks.AnimationObjectContainer;

                //            pAGAnimationUtils.CreateFlybyFromPath(AGAnimationContainer,pAGImportPathOptions);

                //该接口相当于播放的界面,可以自己做一个界面

                IAGAnimationPlayer pAGAplayer = pAGAnimationUtils as IAGAnimationPlayer;

                IAGAnimationEnvironment pAGAeviroment = new AGAnimationEnvironmentClass();

                pAGAeviroment.AnimationDuration = _pDuration; 

                pAGAeviroment.PlayMode  =  esriAnimationPlayMode.esriAnimationPlayOnceForward;

                                 pAGAplayer.PlayAnimation(_pScene  as  IAGAnimationTracks,  pAGAeviroment,  null);

    注意事项:

    在CreateAnimationFromPath函数中有一个           

    ESRI.ArcGIS.Animation.IAGAnimationContainer AGAnimationContainer = pAnimationExtension.AnimationTracks.AnimationObjectContainer;

    各位一定要注意这句话,这句话的运行条件是:必须以加载.sxd的形式填充axSceneControl1,否则获得的AGAnimationContainer就会为空,即必须采用这样的方式  

    axSceneControl1.LoadSxFile(@"E:\GPSData\test.sxd");

    但是AE中没有提供建立.sxd文档的接口,所以大家只能自己事先将.sxd做好,然后在填充axSceneControl1了。

    所以本文不支持以添加图层的形式填充axSceneControl1:

    axSceneControl1.Scene.AddLayer(layer, false);

    而倾向于用户先把.sxd自己做好,然后在在axSceneControl1中加载:

       axSceneControl1.LoadSxFile(@"E:\GPSData\test.sxd");

    作者: 风云

    出处: http://www.cnblogs.com/fengyunlishi/

    本文版权归风云和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利.

    作者: 风云 出处: http://www.cnblogs.com/fengyunlishi/ 本文版权归风云和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利.
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  • 原文地址:https://www.cnblogs.com/fengyunlishi/p/2710622.html
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